simple form

Question

3 ¾ / 60,000=
41 ½ / 3 ¾

A computer can excute 36 instructions per microscecond. How many instructions can it execute in 4 min?

Answer 1

3 ¾ / 60,000 = (15/4)/60,000
= 1/(4*4000)= 1/16,000
41 ½ / 3 ¾ = (83/2)/15/4) = 166/15 = 11.0667

<<A computer can excute 36 instructions per microscecond. How many instructions can it execute in 4 min?>>

36 ops/usec x 4 min x 60 sec/min x 10^6 usec/sec = ?

Answer 2

(36 instructions/microsecond) x (10^6 microseconds/second) x (60 seconds/1 minute) x 4 minutes.
Check my work. The units we don't want should cancel and the units we want to keep should stay. Therefore, the final set of units should be instructions for 4 minutes.